Camp-chair



(ModeL) G. S. KNAPP.

CAMP CHAIR.

No. 279,398. Patented June 12,1883.

UNITED STATES PATENT OFFICE.

GEORGE S. KNAPP, OF CHICAGO, ILLINOIS.

CAMP-CHAIR.

SPEGIFICATION forming part of Letters Patent No. 279,398, dated June 12,1883.

Application filed July 15,1882, (ModeL) To all whom it may concern:

Be it known that I, GEORGE S. KNAPP, of Chicago, in the county of Cookand State of Illinois, have invented certain Improvements in FoldingCamp-Chairs, of which the following is a specification.

The object of this invention is to provide a strong and inexpensivechair, which may be folded into a very compact form, which shall bestrong and rigid when in use, and which shall aflord a good support forthe back.

To this end it consists in a series of legs crossed and connected bypivots and peculiar plates adapted to sustain the seat, and in a hingedback sustained by flexible straps, as hereinafter explained.

Figure 1 is a perspective view of my chair in position for use; Fig. 2,a similar view of the same as it appears when closed or folded; Fig. 3,a top plan view of the joint by which the back is sustained; Fig. 4, aperspective view of one of the corner-pieces.

A represents the frame of the chair B, the flexible detachable seat; 0,the hinged back, and D the braces or straps by which the back issustained. j

The frame consists of four similar pairs of legs, a and b. Each pairconsists of two duplicate legs crossed at the center and united by ahorizontal pivot, c. The four pairs are arranged in planes forming therespective sides of a square, and the upper and lower ends of each pairare united to the corresponding ends of the adjacent pairs by means ofangular corner-plates d and horizontal pivots c, as plainly represented.The frame thus constructed may be extended, as in Fig. 1, in the form ofa hollow square, with the lower endsof the legs resting upon the flooror it may be closed together in the compact form represented in Fig. 2.Each of the metallic corner-pieces has its sides or leaves connected byan intermediate web or plate having a hole or opening, f,

therein to receive the corners of the seat.

The seat B is made of canvas or strong webbing, preferably of two stripscrossed and sewed together, and at each of the four corners it isprovided with a strong hook, g. The seat is applied by engaging thehooks in the respective corner-pieces at the top of the frame, and whenthus attached it is securely sustained by the frame, while at the sametime it serves to hold the frame from spreading, and keep the same atthe proper height.

The back consists of an arm or stick, (3, pivoted at its lower endbetween two plates, 2', which are secured to the upper ends of twoadjoining legs by means of the pivots which hold said legs to theintermediate corner-piece. Being thus applied, the back may be turneddownward against the legs or upward above the seat in position tosupport the back of the occupant. sition by means of two straps, D,extending from its upper end forward to the upper ends of the side legs,as shown.

When the chair is extended for use the legs hold the braces in suchposition that they give the back a firm support; but as the frame isclosed the braces are slackenedso that the back may swing downward.

The braces may be connected to the legs and the back by metalplates orears, as shown, or in any other suitable manner.

It is obvious that the method of hinging and sustaining the back may beused in conneotion with folding legs arranged in any manner which willenable them to lighten and slacken the straps as they are opened andclosed.

I am aware that folding legs have been jointed together and combinedwith folding backs and seats in various ways, and my invention istherefore limited to the peculiar construction herein shown.

The present invention is restricted to those matters and things whichare hereinafter claimed, and as to all matters which may be described orsh own, but which are not claimed, the right is reserved to make thesame the subject of a separate application. Neither do I claim herein,or as part of the present invention, .any feature or combination offeatures described or shown in my application for Letters Patent for aNo. 66,762.

Having thus described my invention, what I claim is- In a folding chair,the combination of the following members: the series of crossed andconnected legs a b, the back arm, 0, the angleplates d, and plates 1' z,uniting one of said angle-plates with arm 0, the flexible seat, and theflexible supports of arm 0, substantially as described and shown.

GEORGE S. KNAPP.

table, filed July 15, 1882,

WVitnesses:

THOMAS KANE, FRANK R. RIDELL.

The back is held in its upright po-

